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"Well, thief! I smell you and I feel your air. I hear your breath. Come along! Help yourself again, there is plenty and to spare!"

Dragons can be flattered, but they're not stupid.

"Do you now?" said the dragon somewhat flattered, even though he did not believe a word of it."

"No dragon can resist the fascination of riddling talk and of wasting time trying to understand it."

"Don't talk to me!" said Smaug. "I know the smell (and taste) of dwarf-no one better. Don't tell me that I can eat a dwarf-ridden pony and not know it! You'll come to a bad end, if you go with such friends. Thief Barrel-rider. I don't mind if you go back and tell them so from me."